Upright-piano action



I. FUSO.

UPRIGHT PIANO AGTION.

(No Model.)

Patented Jan. 26, 1886.

[rw/enior. I naza'o 1 mm, ZJ

f, having fixed to it at its lower end a cush- UNITED STATES PATENTOFFICE.

IGNAZIO FUSO, OF BOSTON, MASSACHUSETTS.

UPRlGHT-PlANO ACTION.

SPECIFICATION forming part of Letters Patent No. 334,768, dated January26, l86.

Application filed August 2.), 1885.

To all whom it may concern.-

Be it known that I, IGNAZIO FUso, of Boston, in the county of Suffolk,of the. Commonwealth of Massachusetts, have invented a new and usefulImprovement in Upright-Piano-Forte Act-ions; and we do hereby declarethe same to be described in the following specification and representedin the accompanying drawings, of which- Figure 1 is a vertical andlongitudinal section, and Fig. 2 a rear elevation, of a piano key andhammer and the operative mechanism of the former containing myinvention, the nature of which is defined in the claims hereinafterpresented. Fig. 3 is a perspective view of the back-catch of the hammer.Fig. 4 is a top View of the tail 6 of the backcatch as bent or bowed orrecessed, as hereinbetore described, such figure also representing thestop K and a part of its sustainingbar, to be explained.

In the said drawings, A denotes the key, directly over which and hingedto a station ary bar, a, of the action-frame B, is a lever or jackelevator, O. A push -bar, D, suspended from the said elevator, restsupon the key, and serves, when the key is struck, to force the elevatorupward. Fulcrumed to the elevator and above it is a jack, E, which is aright angular lever whose upper arm, I), extends at its top into thenotch c of th fulcrum-block d of the hammer F. The backcatch of thehammer is shown at G, it being, as usual, hinged to a stationary bar, H,which is held in place by screws 8, that go through it near its ends andscrew into the frame B. The lower arm or tail, 6, of the said baclccatrhis made broader than usual and has an elliptical opening, t, extendingdown through it. and directly over the adjustable stop K, to bedescribed. There is screwed into and down through the said lower arm ortail, 6, a screw,

ioned head, 9, to rest upon the elevator. hen the said elevator movesupward, it moves the back-catch properly toward the hammer, in order forthe stop It thereof to fall upon the back-catch on the retreat of theham mer from the string. 1

The adjustable stop K, arranged immedi- I ately underneath the openingtin the tail 6 of the back-catch is a headed screw that screws upwardthrough a stationary cross-bar, I, ar-

Serial No. 175,608. (No model.)

ranged as represented, the said stop at its upper end being nickeddiametrically to receive the end of the blade of a screw-driver whensuch blade is inserted through the said opening t. The head of the stopK is directly over the tail of the jack, which as the jack is elevatedto throw the hammer forward is met by the tail of thejack, and as aconsequence causes the jack, in its further advance upward, to be forcedbackward out of engagement with the hammer, to allow of such hammerfalling away from the string and being caught by the back-catch. Byhaving the tail of the back-catch provided with the opening t, asdescribed, it becomes an easy matter to gain access with a screw-driverto the nick of the stop K, for turning the latter to effect its properadjustment, as occasion may require.

It will be evident that, instead of making the tail of the bark-catchwith a hole going down through it, such tail may be notched or recessedin one side of it where over the stop K, such being as shown in Fig. 4at i. By having the baclvoatch fulcrumed or hinged to a bar, H, separatefrom the bar I, carrying the adjustable stop K, and held to the frame Bby screws, as described, the said bar H, with its back catch or catches,can be removed from over the bar I and the stop or stops K, as therepair or recushioning of the back catch or catches as occasion mayrequire, without the necessity, at the same time, of distributing thebar I and the adjustment of its stop or stops K.

I claim, in the upright-piano action 1. The tail of the backcatch,provided with a recess or opening arranged directly over the jack-stopto enable access to the upper end of such jack-stop to be had by a screwdriver inserted in the recess or opening, all being substantially as setforth.

2. The back-catch stop having in its tail a recess or opening, t, asdescribed, and hinged to a bar separate from that for supporting theadjustable stop of the jack, such recess or opening being arrangedimmediately over the upper or nicked end of the said adjustable stop, asset forth.

- IGNAZIO FUSO. Vitnesses:

R. H. EDDY,

ERNEsT B. PRATT.

